[PATCH] serial: efm32: properly namespace location property

[PATCH] serial: efm32: properly namespace location property

[Uwe Kleine-König]

While reviewing an i2c driver for efm32 that needs a similar property
Wolfram Sang pointed out that "location" is a too generic name for something
that is efm32 specific. So add an appropriate namespace and fall back to the
generic name in case of failure.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
---
 drivers/tty/serial/efm32-uart.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/tty/serial/efm32-uart.c b/drivers/tty/serial/efm32-uart.c
index 0eb5b5673ede..028582e924a5 100644
--- a/drivers/tty/serial/efm32-uart.c
+++ b/drivers/tty/serial/efm32-uart.c
@@ -671,7 +671,10 @@ static int efm32_uart_probe_dt(struct platform_device *pdev,
 	if (!np)
 		return 1;
 
-	ret = of_property_read_u32(np, "location", &location);
+	ret = of_property_read_u32(np, "efm32,location", &location);
+	if (ret)
+		/* fall back to old and (wrongly) generic property "location" */
+		ret = of_property_read_u32(np, "location", &location);
 	if (!ret) {
 		if (location > 5) {
 			dev_err(&pdev->dev, "invalid location\n");
-- 
1.9.0

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[PATCH v2] serial: efm32: properly namespace location property

[Uwe Kleine-König]

While reviewing an i2c driver for efm32 that needs a similar property
Wolfram Sang pointed out that "location" is a too generic name for something
that is efm32 specific. So add an appropriate namespace and fall back to the
generic name in case of failure.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
---
Changes since (implicit) v1, sent with
Message-Id: 1394813009-22796-1-git-send-email-u.kleine-koenig@pengutronix.de:

 - adapt dt binding document accordingly

 Documentation/devicetree/bindings/serial/efm32-uart.txt | 4 ++--
 drivers/tty/serial/efm32-uart.c                         | 5 ++++-
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/serial/efm32-uart.txt b/Documentation/devicetree/bindings/serial/efm32-uart.txt
index 8e080b893b49..1984bdfbd545 100644
--- a/Documentation/devicetree/bindings/serial/efm32-uart.txt
+++ b/Documentation/devicetree/bindings/serial/efm32-uart.txt
@@ -6,7 +6,7 @@ Required properties:
 - interrupts : Should contain uart interrupt
 
 Optional properties:
-- location : Decides the location of the USART I/O pins.
+- efm32,location : Decides the location of the USART I/O pins.
   Allowed range : [0 .. 5]
   Default: 0
 
@@ -16,5 +16,5 @@ uart@0x4000c400 {
 	compatible = "efm32,uart";
 	reg = <0x4000c400 0x400>;
 	interrupts = <15>;
-	location = <0>;
+	efm32,location = <0>;
 };
diff --git a/drivers/tty/serial/efm32-uart.c b/drivers/tty/serial/efm32-uart.c
index 0eb5b5673ede..028582e924a5 100644
--- a/drivers/tty/serial/efm32-uart.c
+++ b/drivers/tty/serial/efm32-uart.c
@@ -671,7 +671,10 @@ static int efm32_uart_probe_dt(struct platform_device *pdev,
 	if (!np)
 		return 1;
 
-	ret = of_property_read_u32(np, "location", &location);
+	ret = of_property_read_u32(np, "efm32,location", &location);
+	if (ret)
+		/* fall back to old and (wrongly) generic property "location" */
+		ret = of_property_read_u32(np, "location", &location);
 	if (!ret) {
 		if (location > 5) {
 			dev_err(&pdev->dev, "invalid location\n");
-- 
1.9.0

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Re: [PATCH] serial: efm32: properly namespace location property

[Wolfram Sang]

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On Fri, Mar 14, 2014 at 05:03:29PM +0100, Uwe Kleine-König wrote:
> While reviewing an i2c driver for efm32 that needs a similar property
> Wolfram Sang pointed out that "location" is a too generic name for something
> that is efm32 specific. So add an appropriate namespace and fall back to the
> generic name in case of failure.
> 
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

Acked-by: Wolfram Sang <wsa@the-dreams.de>


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Re: [PATCH v2] serial: efm32: properly namespace location property

[Wolfram Sang]

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On Fri, Mar 14, 2014 at 09:42:11PM +0100, Uwe Kleine-König wrote:
> While reviewing an i2c driver for efm32 that needs a similar property
> Wolfram Sang pointed out that "location" is a too generic name for something
> that is efm32 specific. So add an appropriate namespace and fall back to the
> generic name in case of failure.
> 
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

Acked-by: Wolfram Sang <wsa@the-dreams.de>


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